armoredduramax

You not wanting to drill holes really limits your options. I have a roll n lock bedcover and I mounted my 5 gallon tank and viair compressor under the bed cover box. You could mount the compressor and tank to metal plates then use strong magnets glued to the plates. However your going to run a lot of excess hose and wire to an already existing hole in the bed. I understand you wanting to keep it clean but my 3 Nathan Airchime horns hang under my truck and are constantly exposed to dirt rain ect., if debris does get in them it blows it right out. And I wish now I would have mounted everything under the truck to save bed space because I have never had to do any maintenance to the setup. Also a tip to when you get to installing mount your air valve as close to the horn as you can and don't go cheapo on the valve. That way you can have the reaction you want out of the horn. Also hurry up for your sake, it's the best accessory you will ever install!!